Finding the Third Proportional to 129,415.50 and 281,610

Step by Step Solution

1. Step 1: Write the proportion equation
   129,415.50 : 281,610 = 281,610 : x
2. Step 2: Convert to fraction form
   129,415.50/281,610 = 281,610/x
3. Step 3: Cross multiply
   129,415.50x = 281,610 × 281,610
4. Step 4: Simplify right side
   129,415.50x = 79,304,192,100
5. Step 5: Solve for x
   x = 79,304,192,100/129,415.50
6. Step 6: Final answer
   x = 612,787.43